Which of the following pairs is differentiated by the iodoform test?

Match List-$I$ with List-$II$.
List-$I$ (Reaction):
$A$. Bicyclohexylidene $\rightarrow$ $2$ Cyclohexanone
$B$. Benzene $\rightarrow$ Benzophenone
$C$. Cyclohexanol $\rightarrow$ Cyclohexanone
$D$. Ethylbenzene $\rightarrow$ Potassium benzoate
List-$II$ (Reagents/Condition):
$I$. Benzoyl chloride / Anhydrous $AlCl_3$
$II$. $CrO_3$
$III$. $KMnO_4 / KOH, \Delta$
$IV$. $(i) O_3, (ii) Zn-H_2O$
Choose the correct answer from the options given below:

Which of the following reacts with $2,4-DNP$ reagent to give an orange precipitate?

How will you convert ethanal into the following compounds?
$(i)$ Butane$-1,3-$diol
$(ii)$ But$-2-$enal
$(iii)$ But$-2-$enoic acid

Which of the following products is obtained by the oxidation of propionaldehyde?

Which of the following gives a positive iodoform test?